溶剂对高能球磨回收废PTFE纤维形貌及结晶的影响  

Effect of Solvent on Morphology and Crystallization Behavior of Recycled Polytetrafluoroethylene via High-Energy Ball Milling Technology

作　　者：曹长林[1,2,3] 蔡聪育[4,2,3] 陈庆华[4,2,3] 钱庆荣[4,2,3] 肖荔人[1,2,3] 

机构地区：[1]福建师范大学材料科学与工程学院,福建福州350007 [2]福建省污染控制与资源循环利用重点实验室,福建福州350007 [3]聚合物资源绿色循环利用教育部工程研究中心,福建福州350007 [4]福建师范大学环境科学与工程学院,福建福州350007

出　　处：《塑料》2016年第4期1-4,共4页Plastics

基　　金：基金项目:福建省科技厅(2013HZ0005-1;2014R0108)

摘　　要：采用高能球磨技术回收废聚四氟乙烯(r-PTFE)纤维,利用激光粒度仪、偏光显微镜(POM)、差示扫描量热仪(DSC)及广角X射线衍射(WXRD)等研究了95%乙醇和煤油2种研磨溶剂对r-PTFE形貌及结晶的影响。结果表明:2种溶剂对高能球磨r-PTFE的细化效果和结晶行为具有明显不同的影响,当研磨7 h时,以煤油为溶剂获得的平均粒径、相对结晶度和数均分子量分别为73.33μm、54.12%和4.57×105,而溶剂为95%乙醇获得的r-PTFE则分别为22.48μm、51.23%和3.33×105,并有新的分子链取向。Wasted polytetrafluoroethylene fibers were recycled via high-energy ball milling technique. The effect of ethyl alcohol （95%） and kerosene on the morphology and csystallization behavior of the recycled polytetrafluoroethylene （r-PTFE） were investigated by polarized optical microscope （ POM ）, laser particle size analyzer, differential scanning calorimetry （ DSC ） and Wide X Ray Diffraction （WXRD） respectively. The results showed that the r-PTFEs obtained using two solvents possess quite different refining effect and crystallization behavior. The average diameter, degree of crystallinity and the number-average molecular weight of the r-PTFE obtained by milled for 7 h in kerosene were 73. 33 μm, 54. 12% and of 4. 57×10^5 respectively, whereas those of the r-PTFE obtained in 95% ethyl alcohol were 22.48 μm, 51.23% and 3.33×10^5 with the new orientations of the molecular chains.

关 键 词：回收聚四氟乙烯 高能球磨 力化学 乙醇 煤油 

分 类 号：TQ325.4[化学工程—合成树脂塑料工业]